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June 2, 1931.

' A. AHLBERG 1,808,487

HEATING STOVE OR FURNACE Filed Aug. 20. 1929 //7 yen for 4/ 0? a 14% A6 egg pasta June 2, 1931 UNITED STATES ALFRED .AEL'BERG, OI INDIANAPOLIS,

mm'rmc srovn on rumucn Application filed August 20, 1929. serial No. 387,187.

The object of this invention is to supply air through grate bars to'coal as a fuel in quantities and directions ample to support proper combustion to secure maximum heat.

Another object is to rovide circulation of air below and throu the grate bars to prevent overheating an burning out of the grate.

A further object is to provide .means for chan ing and controlling the location of the re bed to suit varying conditions of 'fuel and also of the weather.

The object also is to provide an efficient andconvenient means for removing clinker and ashes from the grate bars and or keepi the grateclean.

gtillanother object of my invention is to provide means for taking cold air from the floor level of the room where the tem ra- 2 ture of the room is lowest and heat it in the stove and discharge it to the room at the top of the stove. I

A further object is so to circulate the smoke and waste gases of combustion as to remove and retain the heat instead of wastin it by discharging up the chimney.

T accomplish other objects which will hereinafter appear by the device illustrated in the accompanying drawings, in which- Fig. 1 is a side elevation and partial vertical section of a stove embodying my invention;

Fig. 2 is a horizontal section on the line 2-2 of Fig. 1 looking down; Fig. 3 is a front elevation of the stove shown in Fig. 1, with the casing broken away to show the interior construction of the stove; and

Fig. at is a view in cross section on the line 4-4 of Fig. 1. l

Like characters of reference indicate like parts throughout the severalviews of the drawings.

The stove legs 3, at a suitable distance above the floor of the room for the sliding suspension of an ash box 2 from said stove bottom on for emptying. A hole 5 is formed in the bottom 4 is supported on the gr slides 1, whereby the box may be removed Eottom for the discharge of ashes into the Supported u on the bottom 4 is a metal housing, here s own as square in cross section and comprising a front 6, a back 7, and two sides 8, 8. Extending up from the bottom 4 to the top of the. fire box, 'here shown as approximately half of the height of the housing, and from front 6 to back 7 are two parallel partitions 9, which confine the fire box- 10 within narrower limits than the full width of the stove in order to protect a series of air flues 11, here shown as six in number, extending through the bottom 4 and vertically therefrom to and through a top 12. The partitions are preferably made out of fire clay.

The top 12 closes the housing above referred to. The stove front 6 has an ashclean-out door 13 near the bottom 4, and in the door is an air openin which is regulated in area b a rotary amper 14. Supported in part y the front 6, ]ust above the door 13, and extending between and intocontact with both partitions 9, is a plate 15 which is flat'for'approximately a third of the depth of the fire box and from thence curves upwardly and rearwardly forming the curved member 16 which is supported at the rear by the stove back 7. The curved member 16 is formed with longitudinal slots which define grate bars' 17, each having an underside reenforcing flange 18. The grate bars may be cast as in integral part of the member 16, or they may be formed se arately for convenience in the renewal o the separate bars, not shown, in case less than the whole member has to be renewed. e

Coal is su pliedto the fire box, upon the grate ,bars, em a magazine tube 19, which stands obliquely to the back 7 at an angle of approximately 25 degrees therewith for eatest eflicienc with lts lower end pass-j mg throu h the 'ack and dischargin upon the grate ars.. The magazine is pre erably oval in cross section to secure the greatest freedom of coal discharge through it and the upper end of the ma zinc is closed by a lid 20. The coal disc ar'ges by gravity 100 I automatically by gravity as the fire confrom the ma azine and down the curved member 16 an its grate bars, but the coal is arrested in its travel toward the front 6 by a bafiie plate 21, supported by a base 22, which is slidably adjustable on the fiat portion .15. The-position of the bafile plate is.

controlled by a'push and pull bar 23 which is attached to the plate 21 and extends through ,thefront 6. to the outside of the stove.

The ortion 15 has a clean-out hole 24 which is uncovered by sliding the baflle plate and base forward. The front 6 is preferably formed with a door 25.

Passing freely through a suitable openin in the back below the grate bars, is a bar 26, which is pivotallyattached to a hangeu 27 having anarm extension slidingly supported by the back 7, whereby the bar 26 is capable of a swin ing adjustment on the pivot and also of a justment longitudinally.

Fixed rigidly on the inner end of the bar 26 is a fork-like member 29 having a tine or blade for each space between the grate bars and adapted to be entered between the rate bars by the longitudinal movement of bar Y26, and agitated there, by the additional swinging movement of the bar 26 on its pivot, thereb to break up clinkers at the bottom of the re bed and work them and ashes down into the ash box by gravity.

A smoke pipe 30, here shown as located centrally above the fire box has its inner end inserted half way to the bottom of a tubular member 31 of much greater diameter, having a closed bottom, thereby ,com-

lling the waste gases, -etc., to circulate ddwn through the member 31 before enterin the outlet 30,

%his is to-create a circulation within the stove and around the air fiues 11 to more thoroughly heat the current of air passing up throu h said fiues.

Coal p aced in the magazine feeds down sumes the fuel below, upon. the curved grate bars until arrested by contact with the baffle'plate. The volume of coal under combustion is regulated by so moving the baffie plate that the amount of heat obtained can be regulated to the condition of the weather. 1

The heat passes up into contact with the air'flues heating the current of air passing through the-fiues, and the indirect outlet to V the smoke pipe aids in subjecting the air fiues to the maximum heat.

Ashes are thoroughly removed from the rate bars by the manual a itation of the ork fingers and are deposite by gravity in the ash box below the stove bottom leaving the space between the bottom and grate clear in. order to avoid burning out the grate bars.

While I have shown the best embodiment of my invention now known to me, it is capable of changes and additions in commercial production without departing from the spirit of the invention and I therefore do not wish to be limited more than is required by the appended claims.

2. In a stove or furnace,-a housin a fire.

box bottom therein comprising a at portion and a grate bar portion curved upwardly from the flat portion, a fuel magazine discharging by gravity at the top of the curved portion, and a bafile plate on the flat portion to arrest the fuel, saidplate being separate from and adjustable toward and from the curved portion, said curved grate bar having a cleaner located below the curved portion and movable between and past the grate bars andmanually operated means for actuating the cleaner.

3. In a stove, a housing, a pair of partitions dividing the lower end of the housing into three compartments, grate bars located in the middle compartment a baffle plate movable in the middle compartment relative to the grate bars to vary the area and location of the fire area in said compartment,

\and air fiues located in the two outer compartments extending through the housing and out through the bottom and top of the housing the bafile plate being located in front of the grate bars. i 4. In a stove, a housing, a pair of parti tions dividing the lower end of the housing into three compartments, grate bars located in the middle compartment, air fiues located in the two outer compartments extending through the housing and out through the bottom and top of the housin and means located in front of the grate lmrs to vary the position and extent of the fire in the fire pot.

5. In a stove, a housing havin a bottom and a top, a air of partitions dividing the lower end 0 the housing into three compartments, grate bars located in the middle compartment a bafiie plate movable in the middle compartment relative to the grate bars to vary the area and location of the fire area in said compartment, air fiues located in the two-outer compartments extending through the housing and out through the bottom. and top of the housing, a smoke pipe, and means by the passage of waste products of combustion to the smoke pipe for circulating the air around the outside of the air flues the bafile late being separate from and located in nt of the grate bars. Y 6. In a stove or furnace,'a housing having a fire box, a grate in the fire box, a fuel magazine oblique to the housing and discharging by gravity through its lower end into the fire box upon the grate and a baflle plate at the opposite end of the grate bar from the fuel magazine havin reciprocating adjustment toward and rom the magazine to chan e the fire area. 7 %n a stove or furnace, a housing having a fire box, a grate in the fire box, a fuel magazine oval in cross'section oblique to the vertical and discharging by gravity through the walls of the housing upon the rate and a bafile plate at the opposite end 0 the grate bar from the fuel magazine having reciprocating adjustment toward and from.- the magazine tochange the fire area.

8. In a stove, a housing, a pair of partitions dividing the lower end of the housin into three compartments, air flues locate in the two outer compartments extending through the housing and out through the bottom and top thereof, a firebox bottom in the middle compartment comprising a front fiat portion and a grate bar portion a curved upwardly and rearwardly from theflat portion, a fuel magazine dischargingbygravity onto the top of the grate bars, and a baffle plate in the flat portion to arrest the fuel said plate being adjustable toward and from the curved portion to vary thefire area. 1

9. In a stove, a housing, a pair of partitions dividing the lower end of the housing into three compartments, air flues located in the two outer compartments extending through the housing and out through the bottom and top thereof, a firebox bottom inthe middle compartment comprising a front fiat portion having a clean out hole therethrough and a grate bar ortion curved up wardly and rearwardly om the fiat portions, a fuel magazine discharging by gravitly onto the top of the grate bars, abaflie p ate on the flat portion to arrest the fuel and normally cover and close the clean out hole, said plate being movable toward and from the grate bars to regulate the clean ,out and to vary the firearea, a tubular memher above the middle compartment having 00 I ALFRED A a closed bottom, and a smoke 'ipe having it: intake end located in the tu ular mem- Iii testimony whereof I aflix m si ature.

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